Fix validation logic to show both error messages when both fields are blank

Changed the if/else-if structure to two independent if checks so that both
"Author: can't be blank" and "Text: can't be blank" messages are displayed
when both form fields are empty.

Before: Only one error message would show due to else-if chain
After: Both error messages show when both fields are blank

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

client/app/controllers/comments_controller.js

@@ -22,10 +22,8 @@ export default class CommentsController extends Controller {
       errorList.innerHTML = '';
       if (!inputAuthor.value) {
         errors.push('Author');
-      } else if (!inputText.value) {
-        errors.push('Text');
-      } else {
-        errors.push('Author');
+      }
+      if (!inputText.value) {
         errors.push('Text');
       }
       errors.forEach((error) => {